How can AMP invoices be static in Lightning?

[Bitcoin]

How can AMP invoices be static in Lightning?

I have heard that there are static AMP invoices that can be reused multiple times (at least in LND). But previously I understood that you should never reuse the same paymenthash, because you could loose funds.

So how does these static invoices get around that? I suppose you have to put some hash in the HTCL?

Source: How can AMP invoices be static in Lightning?